﻿using System;

class Program
{
    static void Main()
    {
        Console.WriteLine("Enter a digit (0 - 9)");
        int digit = int.Parse(Console.ReadLine());
        switch (digit)
        {
            case 0: Console.WriteLine("zero");
            break;
            case 1: Console.WriteLine("one");
            break;
            case 2: Console.WriteLine("two");
            break;
            case 3: Console.WriteLine("three");
            break;
            case 4: Console.WriteLine("four");
            break;
            case 5: Console.WriteLine("five");
            break;
            case 6: Console.WriteLine("six");
            break;
            case 7: Console.WriteLine("seven");
            break;
            case 8: Console.WriteLine("eight");
            break;
            case 9: Console.WriteLine("nine");
            break;
            default: Console.WriteLine("error");
            break;
        }
    }
}